本文叙述了工厂中常用的球化退火方法。强调T8钢采用屈氏体化加高温回火代替周期球化,可得到在铁素体基础上碳化物呈小、匀、圆分布的组织。经最终热处理后,能细化晶粒,使残余碳化物细小、分布均匀,能提高零件的机械性能和使用寿命。本文还对调质球化工艺因素进行了探讨。 This article describes the commonly used ball annealing method in the factory. Emphasis on the use of T8 steel tuyere temperature tempering instead of periodic balling can be obtained on the basis of ferrite carbide was small, uniform, circular distribution of the organization. After the final heat treatment, can refine the grain, so that the residual carbide small, evenly distributed, can improve the mechanical properties and service life of the parts. This article also discussed the quenching and tempering process factors.